Answered: Ex. 34: A disc is freely rotating about… | bartleby

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Ex. 34: A disc is freely rotating about a vertical
axis passing through its centre at the rate of 100
r.p.m. A blob of wax of mass 20 gm falls on the
disc and sticks to it at a distance of 5 cm from
the axis. If the moment of inertia of the disc
about given axis is 2 x 10-4 kg m² find the new
frequency of rotation of the disc.

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